EP2797636A1 - Method and apparatus for sterilizing a liquid solution using radio-frequency - Google Patents
Method and apparatus for sterilizing a liquid solution using radio-frequencyInfo
- Publication number
- EP2797636A1 EP2797636A1 EP12798728.7A EP12798728A EP2797636A1 EP 2797636 A1 EP2797636 A1 EP 2797636A1 EP 12798728 A EP12798728 A EP 12798728A EP 2797636 A1 EP2797636 A1 EP 2797636A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shells
- pressure
- electrode
- counter
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000001954 sterilising effect Effects 0.000 title claims abstract description 15
- 239000006193 liquid solution Substances 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 9
- 239000011521 glass Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000003978 infusion fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008155 medical solution Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/04—Heat
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/03—Electric current
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/12—Microwaves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/20—Targets to be treated
- A61L2202/23—Containers, e.g. vials, bottles, syringes, mail
Definitions
- TITLE METHOD AND APPARATUS FOR STERILIZING A LIQUID SOLUTION USING RADIO-FREQUENCY
- sterilization of liquids, contained in rigid or flexible receptacles, for medical use is achieved through heating in the range of 121 °C, more generally between 120°C and 125°C, and maintaining such temperature for a period of time determined as a function of coefficients depending on biological parameters .
- the heating process is carried out, within autoclaves, by means of steam or overheated water which, contacting the external surfaces containers of infusion solutions, or other liquids for medical practice, heat the solutions themselves up to the desired temperature and for the time prescribed by various pharmacopeias. Such heating, therefore, takes place from the outside towards the interior.
- the aim of the present invention is to make available for the art a process, and related system, for sterilization of liquids in rigid and/or flexible containers, which provides generating a high-frequency electrical field between two half-shells shaped and acting as electrode and counter-electrode, and having internal surfaces matching the container
- the supplied power passes through the interior of the rigid or flexible container and reaches the non- demineralized liquid solution.
- the electrolytic solution under treatment becomes the conductive liquid mass in which heat is generated according to a ohmic type process and, hence, ohmic conduction: the liquid mass to be sterilized constitutes a dissipative conductor with homogeneous resistivity and/or conductivity.
- Figure 1 shows the present sterilization system, along with the product to be sterilized
- FIG 2 shows again the present sterilization system, without the product therein
- Figure 3 shows lower half-shell in multiple load configuration of the products
- Figure 4 still shows the multiple configuration, also with the upper half-shell
- Figure 5 shows the series equivalent RC circuit, as seen from the high-frequency generator
- Figure 6 shows lower half-shell with two duct holes for pressurization of the internal chamber.
- System 1 comprises at least two half-shells 4 and 5, coupable to one another, with respective centrally shaped contact surfaces. If the half-shells are coupled, the electrode system so formed defines an internal cavity or chamber 6, suitably sized to receive the product to be treated, where the product means container 2 containing the solution to be sterilized.
- System 1 is also equipped with a high-frequency generator 7 to create an electrical field across the two half-shells 4, 5 which act as an electrode and counter- electrode.
- Generator 7, further, includes a power control circuit, which is sized for a continuous service operation; preferably, the fundamental frequency is normally 27,1210,6% MHz, that is a frequency allowed in electro-thermo-electrical applications on ISM equipment (Industrial, Scientific, Medical), nevertheless, also other frequencies allowed for ISM operation could be used without departing from the required scope of the invention .
- the active power output is selected based on the number of containers 2 being treated, also taking into account the amount of liquid solution being sterilized.
- At least a compaction means such as a press, maintains a pressure PI on half- shells 4 and 5, especially during the heating process, with the purpose of contrasting expansion of the bag and overcome a further counter-pressure P2 generated in internal chamber 6 by a pressurized gas generator 10, typically pressurized air, through at least a passage or duct 11 connectable through ordinary and well known union pipes.
- a pressurized gas generator 10 typically pressurized air
- the inlet hole is denoted by 11A.
- half-shells 4 and 5 may be held together by mechanical clamping means 8, acting in combination with press 9.
- Figures 1 and 2 also show a perimetric gasket member 12 disposed on at least one of half shells 4 and/or 5, so that, once tightened to one another, half-shells:
- numeral 13 indicates the shielding, outside system 1, for limiting the electromagnetic RF field irradiated by the system utilizing the generator RF frequencies .
- the sterilization process of a product as described above, and with the already illustrated system 1, comprises a heating step by supplying a capacitive high- frequency current, with electrodes, in a closed circuit electrode system, with a surface facing said product, followed by a cooling step by interruption of delivered current.
- the system is provided with a counter-pressure P2 which acts within chamber 6 formed by half-shells 4 and 5.
- FIG. 4 shows the equivalent RC circuit, seen from the generator; the utilized active power is proportional to the square of load tension Vrf and to the solution conductance 1/R, and therefore to the solution specific conductivity (milliSiemens/cm or microSiemens/cm) , which, in turn, is strongly dependent on temperature and thus increasing during heating.
- First pressure is external to the electrode system, that is the half-shells, and provides for maintaining an external pressure that keeps them in a coupled relation
- Second pressure is a counter-pressure acting from within the electrode system chamber, formed by two half- shells coupled and kept together; in such way, volumetric expansion of flexible containers is restricted in the head regions which are not in contact with the respective electrode, or sealing of rigid containers closure caps is secured.
- Such counter- pressure value ranges from 3 to 5 bars.
- the process provides minimization of the amount of waste power by establishing and controlling a strictly constant temperature liquid flow of the electrode and counter-electrode.
- the described method provides minimization of such waste with constructional provisions such as to control and maintain the two electrodes temperature within a predetermined value (allowing for tolerances) ; this occurs as a result of liquid flow through the dedicated holes, in order to maintain strict control of the process significant parameters, power output from the high-frequency generator and sterilization temperature.
- Active power output from the generator is chosen based on the number of bags or containers being treated, in addition to the quantity in liters of the solution being sterilized.
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000103A ITPR20110103A1 (en) | 2011-12-27 | 2011-12-27 | METHOD AND APPARATUS FOR THE STERILIZATION OF A LIQUID SOLUTION USING RADIO FREQUENCY |
PCT/EP2012/074901 WO2013098059A1 (en) | 2011-12-27 | 2012-12-10 | Method and apparatus for sterilizing a liquid solution using radio-frequency |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2797636A1 true EP2797636A1 (en) | 2014-11-05 |
EP2797636B1 EP2797636B1 (en) | 2016-03-09 |
Family
ID=45571723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12798728.7A Active EP2797636B1 (en) | 2011-12-27 | 2012-12-10 | Apparatus for sterilizing a solution using radio-frequency |
Country Status (7)
Country | Link |
---|---|
US (1) | US9220797B2 (en) |
EP (1) | EP2797636B1 (en) |
CN (1) | CN104093427B (en) |
DK (1) | DK2797636T3 (en) |
IT (1) | ITPR20110103A1 (en) |
PL (1) | PL2797636T3 (en) |
WO (1) | WO2013098059A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3008979B1 (en) | 2013-07-23 | 2015-07-24 | Servier Lab | NOVEL PHOSPHATE DERIVATIVES, PROCESS FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM |
CN104606688A (en) * | 2015-02-03 | 2015-05-13 | 刘德鹏 | Preparation method of high-temperature sterilized product |
CN111821485A (en) * | 2020-07-27 | 2020-10-27 | 华南农业大学 | Tide irrigation high-frequency heating sterilization device for citrus seedling culture |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0522083A4 (en) * | 1990-03-30 | 1993-05-19 | Iit Research Institute | Method and apparatus for rendering medical materials safe |
US6657173B2 (en) * | 1998-04-21 | 2003-12-02 | State Board Of Higher Education On Behalf Of Oregon State University | Variable frequency automated capacitive radio frequency (RF) dielectric heating system |
EP1884249A1 (en) * | 2006-08-01 | 2008-02-06 | L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method and apparatus for plasma treatment of polymeric bottles |
ITPR20070013A1 (en) * | 2007-03-05 | 2008-09-06 | G E A F S R L | METHOD AND EQUIPMENT FOR THE STERILIZATION OF LIQUIDS FOR MEDICAL SANITARY USE |
-
2011
- 2011-12-27 IT IT000103A patent/ITPR20110103A1/en unknown
-
2012
- 2012-12-10 US US14/368,854 patent/US9220797B2/en active Active
- 2012-12-10 WO PCT/EP2012/074901 patent/WO2013098059A1/en active Application Filing
- 2012-12-10 PL PL12798728.7T patent/PL2797636T3/en unknown
- 2012-12-10 CN CN201280069188.4A patent/CN104093427B/en active Active
- 2012-12-10 DK DK12798728.7T patent/DK2797636T3/en active
- 2012-12-10 EP EP12798728.7A patent/EP2797636B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2013098059A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2797636B1 (en) | 2016-03-09 |
DK2797636T3 (en) | 2016-06-20 |
PL2797636T3 (en) | 2016-09-30 |
WO2013098059A1 (en) | 2013-07-04 |
US20140363334A1 (en) | 2014-12-11 |
ITPR20110103A1 (en) | 2013-06-28 |
US9220797B2 (en) | 2015-12-29 |
CN104093427A (en) | 2014-10-08 |
CN104093427B (en) | 2016-12-07 |
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